Syllabus

Methods of Instruction
Theor. Appl. Lab. Total Credit ECTS Credit
42 - - 42 (3 0 3) 5
 
Semester Fall 2016 – 2017
Instructor Assoc.Prof.Dr. Mustafa Serdar KARAKAŞ
Assistant Emre Yılmaz
Schedule Lecture Hours: Friday 12:20-15:10

Course Description

This course is designed to cover the following subjects: understanding failure formation; damage mechanisms such as fatigue, wear, corrosion, creep and other mechanical failures; procedural approaches in failure analysis; metallographic and fractographic studies. Mechanisms in overload, fatigue, impact and creep failures will be discussed in detail. The primary aim of this course is to provide general knowledge on the procedures and mechanisms involved in failure analysis.

Text book:

1) W.D. Callister, Jr., D.G. Rethwisch, Materials Science and Engineering: An Introduction, John Wiley & Sons, 2009.

2) G.E. Dieter, Mechanical Metallurgy (SI Metric Edition), McGraw-Hill, 1988.

3) W.F. Hosford, Mechanical Behavior of Materials, Cambridge University Press, 2009. 

Reference Books:

1) A.J. McEvily, J. Kasivitamnuay, Metal Failures: Mechanisms, Analysis, Prevention, Wiley-Interscience, 2013.

2) I. Milne, R.O. Ritchie, B.L. Karihaloo (Eds.), Comprehensive Structural Integrity, Elsevier, 2006.

Attendance

70% attendance of all lecture hours and 80% attendance of all recitation hours is required by the university’s regulations. Absence from a quiz, lab. or an examination will result in zero grade.

Grading Scheme:

Midterm 1

20%

Midterm 2

20%

Final

40%

HW+Presentation

20%

Tentative Course Outline

Week

Topics

Reading

1

Introduction, Fundamentals of fracture – definitions, Fracture modes, Ductile fracture

Chapter 8

2

Brittle Fracture, Cleavage and intergranular fractures

Chapter 6, 8

3

Fracture mechanics, Stress concentration, the Griffith criterion, Fracture toughness

Chapter 7, 8

4

Fracture mechanics (contd.), Sample problems

Chapter 8

5

Fractography of ceramics

Chapter 8

6

Impact fracture testing, The ductile-to-brittle transition

Chapter 8

7

The ductile-to-brittle transition temperature (DBTT), Metallurgical factors affecting the DBTT

Chapter 7, 8

8

Fatigue, the Wöhler curve, Fatigue probability curves

Chapter 8

9

Crack initiation and crack propagation in fatigue

Chapter 8

10

Beachmarks and striations, the Paris-Erdogan equation 

Chapter 8

11

Environmental factors affecting fatigue, design against fatigue

Chapter 7, 8

12

Creep, Steady-state creep, Effects of stress and temperature on creep

Chapter 5, 8

13

Creep mechanisms, Linear-viscous creep, Power-law creep

Chapter 7, 8

14

Diffusion and Dislocation creep, the Larson-Miller parameter, High temperature alloys, Student Presentations

Chapter 7, 8